| Line | Label | Object Class | Period Type | Balance | Name |
| 1 | Accrual for Environmental Loss Contingencies, Reconciliation of Undiscounted Amount to Recorded Balance [Hierarchy] | us-gaap:AccrualForEnvironmentalLossContingenciesReconciliationOfUndiscountedAmountToRecordedBalanceAbstract | |||
| 2 | Accrual for Environmental Loss Contingencies, Discount Rate | [Concept] Perdent | As Of | us-gaap:AccrualForEnvironmentalLossContingenciesDiscountRate |